Hardt



(No Model.)

PIANO ACTION.

Patented Sept. 1, 1885.

I INVE/VTOR (/mmue M7; By Attorneysv WITNESSES 7 M UNITED STATES PATENTOFFICE.

FREDERICK ENGELHARDT, OF NEW? YORK, N. Y.

PIANO-ACTION.

SPECIFICATION forming part of Letters Patent No. 325,401, datedSeptember 1, 1885.

Application filed March 9, 1885.

of which the following specification is a full,

clear, and exact description.

This invention relates to an improvement in piano-actions, andrefers'more particularly to the buttflange of upright pianos.

The invention consists in the elements of improvement hereinafter morefully pointed out.

In the accompanying drawings, Figure 1 is a longitudinal verticalsection of a piano-action embodying my invention. Fig. 2 is a top viewof my improved butt-flange, showing it connected to the hammer-butt andthe damper. Fig. 3 is a side view of Fig. 2.

The letter a represents the key of a piano. I) is the bottom rail, 0thejack, d the hammerbutt, 0 the action-rail, andf the damper, all asusual. The damper carries the butt-flange g, to the forward end of whichthe hammer-butt is pivoted. Around this pivot the hammerbutt oscillatesas the piano is played. The butt flange 9 is made of metal, and is ofthe form shown in Fig. 2that is to say,it is made in the form of asquare plate provided with two projections,'h Ii, at its rear end tostraddle the damperf, to which it is pivotally connected. At the frontthe plate 9 is cut away at the top to form astep,i,against which thereis placed a small rigid binding-plate, j. This plate extends forward tothe front edge of plate 9.

Beneath plate j the plate 9 is provided with a transverse groove, is, toreceive a pivot-pin,

(No model.)

Z. This pin,which is the pivotpin of the hammer-butt, is introduced withits ends into two cheek-pieces, m m, of the han1mer-buttd,forming a slotbetween them, Fig. 2. The pivot is clasped between plates gj by means ofa screw, it, which connects said plates. The pin Z is permanentlyattached to the hammer-butt,and in order to connect this butt to thebutt-flange the screw a is loosened and the pin introduced into thegroove 70. The screw n is then tightened up, and the pin is thus lockedin position. In order to facilitate the introduction of pin Z betweenplates 9 j, I prefer to'bevel the front edge of the plate j, as shown inFigs. 1 and 3.

The drawings show the invention applied to an action known as anAmerican-style action. In the French-style action the buttfiange g isplaced in an upright position, and is attached to the action-rail einstead of to the damper f. Otherwise the parts remain of the sameconstruction.

This invention may also be applied to grand pianos.

I claim as my invention- 1. The combination of hammer-butt d andbutt-flange q,cut away at the top to form step t, with rigid plate j,fitting against said step and with screw 12, substantially as specified.

2. The combination of hammer-butt d with butt-flange 9, plate j, havingbeveled front edge, and with screw 02, substantially as shown anddescribed.

FREDERICK ENGELHARDT.

\Vitnesse's:

F. v. BRIESEN, ROBT. ROY.

